I saw reasonably sized desk fans upstairs in the tansas in
Marmaris for just under 17 lira, at that price is much cheaper than renting and you dont have to cart it home, just give it to someone nice in the resort the day you go home. I did see larger ones with stands, they were more expensive but still cheaper than renting and also if you know someone there they can look after it until your next holiday (people do tend to return again and again!)